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Synthesis of size-tuneable CO2-philic imprinted polymeric particles (MIPs) for low-pressure CO2 capture using oil-in-oil suspension polymerisation
journal contribution
posted on 2017-09-15, 08:27 authored by Seyed Ali Nabavi, Goran VladisavljevicGoran Vladisavljevic, Yidi Zhu, Vasilije ManovicHighly selective molecularly imprinted poly[acrylamide-co-(ethyleneglycol dimethacrylate)] polymer particles (MIPs) for CO2 capture were synthesised by suspension polymerisation via oil-in-oil emulsion. Creation of CO2-philic, amide decorated cavities in the polymer matrix led to a high affinity to CO2. The imprinted polymers showed markedly higher CO2 uptakes compared to their non-imprinted counterparts, and the maximum equilibrium CO2 capture capacity of 1.1 mmol g-1 was achieved at 273 K. At 0.15 bar CO2 partial pressure, the CO2/N2 selectivity was 49 (corresponding to 91% purity of the gas stream after regeneration), and reached 97 at ultra-low CO2 partial pressures. The heat of adsorption was below 32 kJ mol-1 and the temperature of onset of intense thermal degradation was 351-376 °C. An increase in monomer-to-crosslinker molar ratio in the dispersed phase up to 1:2.5 led to a higher affinity towards CO2 due to higher density of selective amide groups in the polymer network. MIPs are a promising option for industrial packed and fluidised bed CO2 capture systems due to large particles with a diameter up to 1200 μm and irregular oblong shapes formed due to arrested coalescence during polymerisation, occurring as a result of internal elasticity of the partially polymerised semisolid drops.
Funding
The authors gratefully acknowledge the financial support for this work by coERCe granted by Innovate UK, project Grant: 102213, and Cambridge Engineering and Analysis Design (CEAD) Ltd.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
Published in
Environmental Science and TechnologyVolume
51Issue
19Pages
11476–11483Citation
NABAVI, S.A. ... et al, 2017. Synthesis of size-tuneable CO2-philic imprinted polymeric particles (MIPs) for low-pressure CO2 capture using oil-in-oil suspension polymerisation. Environmental Science and Technology, 51 (19), pp. 11476–11483.Publisher
© American Chemical SocietyVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/Acceptance date
2017-09-08Publication date
2017-09-08Copyright date
2017Notes
This is an open access article published under a Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/ISSN
0013-936XPublisher version
Language
- en